LT-13555, Create items from master lists with fixed guids

This has three distinct parts: grammatical categories,
inflection features, and phonological features. The master
files (GOLDEtic, EticGlossList, and PhonFeatsEticGlossList)
are modified, basically by adding guids.
Each item that has an id has a unique guid, and fs elements have
a typeguid, one for each @type, in EticGlossList.xml.
I also modified FeatureCatalogue.xml and the xsl file that is
occasionally used to regenerate EticGlossList.xml from it.
PhonFeatEticGlossList.xml did not previously contain representations
of feature values, as these were predictably "+" and "-". They were
added mainly in order to assign unique guids to them, but it is also
a desired enhancement to the dialog, as eventually we want to support
other options, like high, middle, and low tone. This actually simplified
the dialog code.

Change-Id: I4d061753aa246edcf9aad5772371f0da3e85e6fb